General Witness Affidavit(PDF, 465KB) - Must be filed at our office; varied uses (e.g. Executor death, witness death).Complete and sign this application LEGIBLY using ONLY black or blue ink on the attached or downloaded form using only 8 ½" x 11" (or A4 8.25" x 11.7") paper. If you are submitting this affidavit in a DMV office, the Motor Vehicle Representative MUST witness your signature. Signature. On this web site; Delivered to your county voter registration office. Complete the Certificate of Service (Form I-6), which shows how the other party was served. Original affidavit must be filed with the Allegheny County Department of Court Records, formerly the Prothonotary. These forms will be useful when filing required documents related to estates of deceased or incapacitated persons. Not all forms are listed. This office is called the Prothonotary or Office of Judicial Records.